Summary
Incorporation of amino acids into mammalian cell protein shows immediate linear kinetics when measured at intervals as small as 5 sec. Free amino acids equilibrate instantaneously across the cell membrane, acting as the precursor supply. Glycine, which does not initially show linear kinetics, may have a significant endogenous precursor supply, but this is not the acid-soluble pool.
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Acknowledgments. I thank the University of Aberdeen Medical Faculty Endowment Fund for support, and Mrs J. Robertson for technical assistance.
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Wheatley, D.N. On the problem of linear incorporation of amino acids into cell protein. Experientia 38, 818–820 (1982). https://doi.org/10.1007/BF01972291
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DOI: https://doi.org/10.1007/BF01972291